1900 Series - Maintenance Manual

XIX. Replacement Parts PlanningBasic GuidelinesUse the following guidelines as reference for developinga replacement parts plan:1. Classify the total number of valves in service by size,type, and temperature class.2. Classify parts inventory by the tendency to requirereplacement.• Class I - Most frequently replaced• Class II - Less frequently replaced but critical in anemergency3. Parts for the valve types covered by this manual areclassified on Tables 28 and 29. “Qty. Parts” is thenumber of parts or sets recommended to achievea desired need probability as it relates to the totalnumber of valves in service by size and type. Forexample, a “Qty. Parts of 1” (25.4 mm) for “Valvesin Service of 5” (127.00 mm) means that one partshould be stocked for every five valves of the sametype and size in service.4. When ordering replacement parts, state the size,type, and serial number of the valve for which partsare required using correct nomenclature (see Figures1 through 10).5. Predicted availability indicates the percentage chancethe user plant will have the right parts to make aproper repair (i.e., if Class I parts are stocked at theowner’s facility, the parts needed to repair the valvein question will be immediately available in 70% of allinstances).Replacement Parts ListConsult the Recommended Spare Parts list (seeTables 27 and 28) to define the parts to be includedin the inventory plan. Select the desired parts anddetermine those required for proper maintenance of thevalve population in the plant.Identification and OrderingEssentialsWhen ordering service parts, furnish the followinginformation to ensure receipt of the correct replacementparts:1. Identify valve by the following nameplate data:• Size• Type• Temperature Class• Serial Number Example 1: 1.5˝ (38.10 mm) 1910FcS/N TD-945782. Specify parts required by:• Part Name (see Figures 1 through 10)• Part Number (if known)• QuantityIn addition, the serial number is stamped on the topedge of the outlet flange. Include the one or two letterspreceding the figures in the serial number(see Figures 46 through 49).Contact Parts Marketing: (318) 640-6044.RESTRICTED LIFT VALVERESTRICTED BYRESTRICTED CAPACITYRESTRICTED CAPACITY LIFTTHE ACTUAL DISCHARGE CAPACITYMAY EXCEED THAT STAMPED ON THEVALVE. THIS SHOULD BE CONSIDEREDAND THE MANUFACTURER CONSULTEDWHEN SIZING THE DISCHARGE SYSTEM.CODE CASEINFigure 46: Typical Valve NameplateFigure 47: Typical Valve Nameplate1900 Series Safety Valve (July/2010) | 55